Powdered sugar

Lots of different sugar types exist, and the most common types
are:

Granulated sugar or white sugar is made from sugar canes or
sugar beets, that is highly refined sugar. Granulated sugar is also
available in cubes or tablets of various sizes, as well as a variety
of textures.

Superfine sugar (aka. castor or caster sugar) is more finely
granulated, and dissolves almost instantly.

Confectioners' or powdered sugar is granulated sugar that
has been crushed into a fine powder with a small amount of cornstarch
is added to prevent clumping.

Decorating or coarse sugar has granules about four times
larger than those of regular granulated sugar.

Brown sugar is white sugar combined with molasses, which
gives it a soft texture. The two most common types of brown sugar are
light and dark. The lighter the brown sugar is, the more delicate the
flavor.

In the bar sugar is usually used to sweeten drinks and to rim
glasses.